Interior renovations and a metal clad 2-story rear addition create a modern oasis for a couple returning to Washington DC from a stint in Los Angeles. Purchased as a shell in an established historic neighborhood a few miles north of the White House, this 1913 rowhouse carefully conceals the new work behind its preserved Mediterranean front façade. New fenestrations, including a giant oculus in the master bath, a band of transoms and sidelights in the kitchen, exploit light and provide views to the garden and the sky.